Daniel Michalski defeated Dominic Thiem in the second round of the ATP Challenger Tour event in Szekesfehervar on clay on 13 March 2024. The victory represents a significant result for Michalski against a former Grand Slam champion, though the final set scores are unavailable. Thiem, a two-time Australian Open finalist and US Open champion, has competed sporadically on the Challenger circuit in recent seasons as he works to rebuild his ranking following injury. Michalski's win advances him into the quarter-finals at the Hungarian venue and demonstrates his capability to compete against established touring professionals on his preferred surface. The result may provide momentum for Michalski's ranking progression on the secondary tour.